64445243143 has 4 divisors (see below), whose sum is σ = 64469176488. Its totient is φ = 64421309800.

The previous prime is 64445243123. The next prime is 64445243153. The reversal of 64445243143 is 34134254446.

64445243143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64445243143 - 2⁵ = 64445243111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64445243096 and 64445243105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64445243113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11962633 + ... + 11968018.

It is an arithmetic number, because the mean of its divisors is an integer number (16117294122).

Almost surely, 2^64445243143 is an apocalyptic number.

64445243143 is a deficient number, since it is larger than the sum of its proper divisors (23933345).

64445243143 is a wasteful number, since it uses less digits than its factorization.

64445243143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23933344.

The product of its digits is 552960, while the sum is 40.

Adding to 64445243143 its reverse (34134254446), we get a palindrome (98579497589).

The spelling of 64445243143 in words is "sixty-four billion, four hundred forty-five million, two hundred forty-three thousand, one hundred forty-three".